正当美国国会设法减少移民科学家的人数之时,两位资 深的经济学家却以强有力的证据说明:在对这个国家作出贡献的科学家中,移民科学家的人数要比以往所估计的多得多。 这是新近在巴尔的摩召开的美国科学促进会年会上由斯蒂芬和利文所做的学术报告中披露的。这个报告共调查了4800名在美国工作的有高度成就的科学家及工程师。这些 At a time when the U.S. Congress is trying to reduce the number of immigrant scientists, the two senior economists have strong evidence that the number of immigrant scientists is much higher than previously estimated among scientists who contributed to the country . This was disclosed in a recent academic report by Stephen and Levine at the annual meeting of the American Association for the Advancement of Science held in Baltimore. The report surveyed 4,800 highly accomplished scientists and engineers working in the United States. These ones